flow like the river

BACK_BACK/node_modules/postcss-normalize-string/LICENSE-MIT

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+Copyright (c) Ben Briggs <beneb.info@gmail.com> (http://beneb.info)
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.

BACK_BACK/node_modules/postcss-normalize-string/README.md

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+# [postcss][postcss]-normalize-string
+
+> Normalize strings with PostCSS.
+
+## Install
+
+With [npm](https://npmjs.org/package/postcss-normalize-string) do:
+
+```
+npm install postcss-normalize-string --save
+```
+
+## Example
+
+### Input
+
+```css
+p:after{ content: '\\'string\\' is intact' }
+```
+
+### Output
+
+```css
+p:after{ content:"'string' is intact" }
+```
+
+## Usage
+
+See the [PostCSS documentation](https://github.com/postcss/postcss#usage) for
+examples for your environment.
+
+## API
+
+### normalize([options])
+
+#### options
+
+##### preferredQuote
+
+Type: `string`
+Default: `double`
+
+Sets what type of quote to prefer. Possible values are `single` and `double`.
+
+```js
+var css = 'p:after{content:""}';
+console.log(postcss(normalize({preferredQuote: 'single'})).process(css).css);
+//=> p:after{content:''}
+```
+
+## Contributors
+
+See [CONTRIBUTORS.md](https://github.com/cssnano/cssnano/blob/master/CONTRIBUTORS.md).
+
+## License
+
+MIT © [Ben Briggs](http://beneb.info)
+
+[postcss]: https://github.com/postcss/postcss

BACK_BACK/node_modules/postcss-normalize-string/dist/index.js

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+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+
+var _postcss = require('postcss');
+
+var _postcss2 = _interopRequireDefault(_postcss);
+
+var _postcssValueParser = require('postcss-value-parser');
+
+var _postcssValueParser2 = _interopRequireDefault(_postcssValueParser);
+
+var _has = require('has');
+
+var _has2 = _interopRequireDefault(_has);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+/*
+ * Constants (parser usage)
+ */
+
+const SINGLE_QUOTE = '\''.charCodeAt(0);
+const DOUBLE_QUOTE = '"'.charCodeAt(0);
+const BACKSLASH = '\\'.charCodeAt(0);
+const NEWLINE = '\n'.charCodeAt(0);
+const SPACE = ' '.charCodeAt(0);
+const FEED = '\f'.charCodeAt(0);
+const TAB = '\t'.charCodeAt(0);
+const CR = '\r'.charCodeAt(0);
+
+const WORD_END = /[ \n\t\r\f'"\\]/g;
+
+/*
+ * Constants (node type strings)
+ */
+
+const C_STRING = 'string';
+const C_ESCAPED_SINGLE_QUOTE = 'escapedSingleQuote';
+const C_ESCAPED_DOUBLE_QUOTE = 'escapedDoubleQuote';
+const C_SINGLE_QUOTE = 'singleQuote';
+const C_DOUBLE_QUOTE = 'doubleQuote';
+const C_NEWLINE = 'newline';
+const C_SINGLE = 'single';
+
+/*
+ * Literals
+ */
+
+const L_SINGLE_QUOTE = `'`;
+const L_DOUBLE_QUOTE = `"`;
+const L_NEWLINE = `\\\n`;
+
+/*
+ * Parser nodes
+ */
+
+const T_ESCAPED_SINGLE_QUOTE = { type: C_ESCAPED_SINGLE_QUOTE, value: `\\'` };
+const T_ESCAPED_DOUBLE_QUOTE = { type: C_ESCAPED_DOUBLE_QUOTE, value: `\\"` };
+const T_SINGLE_QUOTE = { type: C_SINGLE_QUOTE, value: L_SINGLE_QUOTE };
+const T_DOUBLE_QUOTE = { type: C_DOUBLE_QUOTE, value: L_DOUBLE_QUOTE };
+const T_NEWLINE = { type: C_NEWLINE, value: L_NEWLINE };
+
+function stringify(ast) {
+    return ast.nodes.reduce((str, { value }) => {
+        // Collapse multiple line strings automatically
+        if (value === L_NEWLINE) {
+            return str;
+        }
+
+        return str + value;
+    }, '');
+}
+
+function parse(str) {
+    let code, next, value;
+    let pos = 0;
+    let len = str.length;
+
+    const ast = {
+        nodes: [],
+        types: {
+            escapedSingleQuote: 0,
+            escapedDoubleQuote: 0,
+            singleQuote: 0,
+            doubleQuote: 0
+        },
+        quotes: false
+    };
+
+    while (pos < len) {
+        code = str.charCodeAt(pos);
+
+        switch (code) {
+            case SPACE:
+            case TAB:
+            case CR:
+            case FEED:
+                next = pos;
+
+                do {
+                    next += 1;
+                    code = str.charCodeAt(next);
+                } while (code === SPACE || code === NEWLINE || code === TAB || code === CR || code === FEED);
+
+                ast.nodes.push({
+                    type: 'space',
+                    value: str.slice(pos, next)
+                });
+                pos = next - 1;
+                break;
+            case SINGLE_QUOTE:
+                ast.nodes.push(T_SINGLE_QUOTE);
+                ast.types[C_SINGLE_QUOTE]++;
+                ast.quotes = true;
+                break;
+            case DOUBLE_QUOTE:
+                ast.nodes.push(T_DOUBLE_QUOTE);
+                ast.types[C_DOUBLE_QUOTE]++;
+                ast.quotes = true;
+                break;
+            case BACKSLASH:
+                next = pos + 1;
+
+                if (str.charCodeAt(next) === SINGLE_QUOTE) {
+                    ast.nodes.push(T_ESCAPED_SINGLE_QUOTE);
+                    ast.types[C_ESCAPED_SINGLE_QUOTE]++;
+                    ast.quotes = true;
+                    pos = next;
+                    break;
+                } else if (str.charCodeAt(next) === DOUBLE_QUOTE) {
+                    ast.nodes.push(T_ESCAPED_DOUBLE_QUOTE);
+                    ast.types[C_ESCAPED_DOUBLE_QUOTE]++;
+                    ast.quotes = true;
+                    pos = next;
+                    break;
+                } else if (str.charCodeAt(next) === NEWLINE) {
+                    ast.nodes.push(T_NEWLINE);
+                    pos = next;
+                    break;
+                }
+            /*
+             * We need to fall through here to handle the token as
+             * a whole word. The missing 'break' is intentional.
+             */
+            default:
+                WORD_END.lastIndex = pos + 1;
+                WORD_END.test(str);
+
+                if (WORD_END.lastIndex === 0) {
+                    next = len - 1;
+                } else {
+                    next = WORD_END.lastIndex - 2;
+                }
+
+                value = str.slice(pos, next + 1);
+
+                ast.nodes.push({
+                    type: C_STRING,
+                    value
+                });
+
+                pos = next;
+        }
+        pos++;
+    }
+
+    return ast;
+}
+
+function changeWrappingQuotes(node, ast) {
+    const { types } = ast;
+
+    if (types[C_SINGLE_QUOTE] || types[C_DOUBLE_QUOTE]) {
+        return;
+    }
+
+    if (node.quote === L_SINGLE_QUOTE && types[C_ESCAPED_SINGLE_QUOTE] > 0 && !types[C_ESCAPED_DOUBLE_QUOTE]) {
+        node.quote = L_DOUBLE_QUOTE;
+    }
+
+    if (node.quote === L_DOUBLE_QUOTE && types[C_ESCAPED_DOUBLE_QUOTE] > 0 && !types[C_ESCAPED_SINGLE_QUOTE]) {
+        node.quote = L_SINGLE_QUOTE;
+    }
+
+    ast.nodes = ast.nodes.reduce((newAst, child) => {
+        if (child.type === C_ESCAPED_DOUBLE_QUOTE && node.quote === L_SINGLE_QUOTE) {
+            return [...newAst, T_DOUBLE_QUOTE];
+        }
+
+        if (child.type === C_ESCAPED_SINGLE_QUOTE && node.quote === L_DOUBLE_QUOTE) {
+            return [...newAst, T_SINGLE_QUOTE];
+        }
+
+        return [...newAst, child];
+    }, []);
+}
+
+function normalize(value, preferredQuote) {
+    if (!value || !value.length) {
+        return value;
+    }
+
+    return (0, _postcssValueParser2.default)(value).walk(child => {
+        if (child.type !== C_STRING) {
+            return;
+        }
+
+        const ast = parse(child.value);
+
+        if (ast.quotes) {
+            changeWrappingQuotes(child, ast);
+        } else if (preferredQuote === C_SINGLE) {
+            child.quote = L_SINGLE_QUOTE;
+        } else {
+            child.quote = L_DOUBLE_QUOTE;
+        }
+
+        child.value = stringify(ast);
+    }).toString();
+}
+
+const params = {
+    rule: 'selector',
+    decl: 'value',
+    atrule: 'params'
+};
+
+exports.default = _postcss2.default.plugin('postcss-normalize-string', opts => {
+    const { preferredQuote } = Object.assign({}, {
+        preferredQuote: 'double'
+    }, opts);
+
+    return css => {
+        const cache = {};
+
+        css.walk(node => {
+            const { type } = node;
+
+            if ((0, _has2.default)(params, type)) {
+                const param = params[type];
+                const key = node[param] + '|' + preferredQuote;
+
+                if (cache[key]) {
+                    node[param] = cache[key];
+
+                    return;
+                }
+
+                const result = normalize(node[param], preferredQuote);
+
+                node[param] = result;
+                cache[key] = result;
+            }
+        });
+    };
+});
+module.exports = exports['default'];

BACK_BACK/node_modules/postcss-normalize-string/package.json

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+{
+  "name": "postcss-normalize-string",
+  "version": "4.0.2",
+  "description": "Normalize wrapping quotes for CSS string literals.",
+  "main": "dist/index.js",
+  "files": [
+    "dist",
+    "LICENSE-MIT"
+  ],
+  "scripts": {
+    "prepublish": "cross-env BABEL_ENV=publish babel src --out-dir dist --ignore /__tests__/"
+  },
+  "keywords": [
+    "css",
+    "postcss",
+    "postcss-plugin"
+  ],
+  "license": "MIT",
+  "devDependencies": {
+    "babel-cli": "^6.0.0",
+    "cross-env": "^5.0.0"
+  },
+  "homepage": "https://github.com/cssnano/cssnano",
+  "author": {
+    "name": "Ben Briggs",
+    "email": "beneb.info@gmail.com",
+    "url": "http://beneb.info"
+  },
+  "repository": "cssnano/cssnano",
+  "dependencies": {
+    "has": "^1.0.0",
+    "postcss": "^7.0.0",
+    "postcss-value-parser": "^3.0.0"
+  },
+  "bugs": {
+    "url": "https://github.com/cssnano/cssnano/issues"
+  },
+  "engines": {
+    "node": ">=6.9.0"
+  }
+}