~improve docs

Author: alecrabbit

.env.dist

@@ -1,5 +1,6 @@
-USE_FFI=true
-UNICODE_VERSION=latest
-
 VAR_DUMPER_SERVER=app:9912
 WORKING_DIR=/app
+
+# Package related variables
+USE_FFI=true
+UNICODE_VERSION=latest

README.md

@@ -46,9 +46,10 @@ echo wcwidth('🐘🐘🐘'); // 2 - only first char is considered
 ### <a name="ffi-extension"></a> FFI extension
 > ‼️ Experimental feature. 
 
-If `FFI` extension is available, it can be used for better performance. To enable it, set `USE_FFI` environment variable to `true`.
+For improved performance, consider leveraging the Foreign Function Interface (`FFI`) extension, if available. To enable 
+this feature, set the `USE_FFI` environment variable to `true`.
 
 ```dotenv
 USE_FFI=true
 ```
-> **Note** When using ffi extension `version` is ignored completely.
+> **Note** When using `ffi` extension `version` value is ignored completely.

doc/usage.md

@@ -18,9 +18,10 @@ function wcswidth(string $wcs, ?string $version = null): int;
 
 ### Unicode version
 
-> Note: When using ffi extension version is ignored completely.
+> Note: When using `ffi` extension version value is ignored completely.
 
-Unicode version can be set globally for all functions using `UnicodeVersion::set()` method or through `UNICODE_VERSION` environment variable automatically.  
+Unicode version can be set globally for all functions using `UnicodeVersion::set()` method or through `UNICODE_VERSION` 
+environment variable automatically.  
 ```php
 use AlecRabbit\WcWidth\UnicodeVersion;
 
@@ -47,12 +48,13 @@ use AlecRabbit\WcWidth\UnicodeVersion;
 echo UnicodeVersion::get(); // 14.0.0
 ```
 
-If, for some reason, you need to reset current version to `null`, use `UnicodeVersion::reset()` method.
-
+In case you need to reset the current version to `null` for any specific reason, you can achieve this by utilizing the 
+`UnicodeVersion::reset()` method.
 ```php
 use AlecRabbit\WcWidth\UnicodeVersion;
 
 UnicodeVersion::reset();
 ```
 
-> Note: The package suggests to install `ext-mbstring` but it's implied that it is already installed or some polyfill is used.
+> The package recommends installing `ext-mbstring`, although it assumes that this extension is either already installed
+> or that a suitable polyfill is being used.