Code quality enhancements

- Refactored PHP code quality tools in package.json
- Updated file documentation
- Improved docbloc formatting
- Fix whitespacing in Math stuff

Author: tomkyle

README.md

@@ -123,7 +123,7 @@ The result array contains additional information like the data range 𝑹, the i
 Simple rule using the square root of the sample size.
 
 $$
-k = \left \lceil \sqrt{n} \; \right \rceil 
+k = \left \lceil \sqrt{n} \ \right \rceil 
 $$
 
 ```php
@@ -141,7 +141,7 @@ $k = BinSelection::squareRoot($data);
 Based on the logarithm of the sample size. Good for normal distributions.
 
 $$
-k = 1 + \left \lceil \; \log_2(n) \; \right \rceil
+k = 1 + \left \lceil \ \log_2(n) \  \right \rceil
 $$
 
 ```php
@@ -159,7 +159,7 @@ $k = BinSelection::sturges($data);
 Improvement of *Sturges*’ rule that accounts for data skewness.
 
 $$
-k = 1 + \left\lceil \; \log_2(n) + \log_2\left(1 + \frac{|g_1|}{\sigma_{g_1}}\right) \; \right \rceil 
+k = 1 + \left\lceil \  \log_2(n) + \log_2\left(1 + \frac{|g_1|}{\sigma_{g_1}}\right) \  \right \rceil 
 $$
 
 ```php
@@ -189,7 +189,7 @@ R = \max_i x_i - \min_i x_i
 $$
 
 $$
-k = \left \lceil \frac{R}{h} \right \rceil 
+k = \left \lceil \ \frac{R}{h} \ \right \rceil 
 $$
 
 The result is an array with keys `width`, `bins`, `range`, and `stddev`. Map them to variables like so:
@@ -241,7 +241,7 @@ list($h, $k, $R, $IQR) = BinSelection::freedmanDiaconis($data);
 Uses the cube root of the sample size, generally provides more bins than *Sturges*. This is the original *Rice Rule*:
 
 $$
-k = \left \lceil \; \sqrt[3]{2n} \enspace \right \rceil = \left \lceil \; (2n)^{1/3} \; \right \rceil 
+k = \left \lceil \  \sqrt[3]{2n} \enspace \right \rceil = \left \lceil \  (2n)^{1/3} \  \right \rceil 
 $$
 
 ```php
@@ -259,7 +259,7 @@ $k = BinSelection::terrellScott($data);
 Uses the cube root of the sample size, generally provides more bins than *Sturges*. Formula as taught by David M. Lane at Rice University. — **N.B.** This *Rice Rule* seems to be not the original. In fact, *Terrell-Scott’s* (1985) seems to be. Also note that both variants can yield different results under certain circumstances. This Lane’s variant from the early 2000s is however more commonly cited:
 
 $$
-k = 2 \times \left \lceil \; \sqrt[3]{n} \enspace \right \rceil =  2 \times \left \lceil \; n^{1/3} \; \right \rceil 
+k = 2 \times \left \lceil \  \sqrt[3]{n} \enspace \right \rceil =  2 \times \left \lceil \  n^{1/3} \  \right \rceil 
 $$
 
 ```php

package.json

@@ -8,11 +8,15 @@
     "watch": "npm-run-all -p watch:*",
     "watch:src": "chokidar \"src/**/*.php\" -c \"./vendor/bin/frt {path} && npm run phpstan {path} && npm run rector {path}\"",
     "watch:tests": "chokidar \"tests/**/*.php\" -c \"npm run phpunit:short {path}\"",
+
     "phpstan": "./vendor/bin/phpstan --no-progress analyse",
-    "phpcs": "./vendor/bin/php-cs-fixer fix --verbose --diff --dry-run",
+
+    "phpcs": "npm run phpcs:apply -- --dry-run",
     "phpcs:apply": "./vendor/bin/php-cs-fixer fix --verbose --diff",
-    "rector": "./vendor/bin/rector process --dry-run",
+
+    "rector": "npm run rector:apply -- --dry-run",
     "rector:apply": "./vendor/bin/rector process",
+
     "phpunit": "./vendor/bin/phpunit --testdox",
     "phpunit:short": "npm run phpunit -- --no-coverage"
   },

phpstan.neon.dist

@@ -6,4 +6,5 @@ parameters:
     level: 9
     paths:
         - src
+        - tests