fix markdown file

README.md

@@ -1,39 +1,44 @@
 # style50
+
 This is style50, a tool with which code can be checked against the CS50 style guide.
 
 ## Installation
 
-    pip install style50
+```bash
+pip install style50
+```
 
 In order to style check C, C++, or Java code, a recent version (`>=3.0.1`) of `astyle` must be installed. `astyle` may be downloaded [here](https://sourceforge.net/projects/astyle/files/astyle/astyle%203.0.1/).
 
 ### Windows
+
 Along with most of CS50's command line tools, `style50` supports being run on Windows but only via the [Linux Subsystem in Windows 10](https://msdn.microsoft.com/en-us/commandline/wsl/install_guide). After launching it, `style50` can be installed using the `pip` command above.
 
 ## Usage
 
-```
-usage: style50 [-h] [-o MODE] [-v] [-V] [-E] [-i PATTERN] file [file ...]
-
-positional arguments:
-  file                  file or directory to lint
-
-optional arguments:
-  -h, --help            show this help message and exit
-  -o MODE, --output MODE
-                        output mode, which can be character (default), split,
-                        unified, score, or json
-  -v, --verbose         print full tracebacks of errors
-  -V, --version         show program's version number and exit
-  -E, --extensions      print supported file extensions (as JSON list) and
-                        exit
-  -i PATTERN, --ignore PATTERN
-                        paths/patterns to be ignored
+```bash
+    usage: style50 [-h] [-o MODE] [-v] [-V] [-E] [-i PATTERN] file [file ...]
+
+    positional arguments:
+    file                  file or directory to lint
+
+    optional arguments:
+    -h, --help            show this help message and exit
+    -o MODE, --output MODE
+                            output mode, which can be character (default), split,
+                            unified, score, or json
+    -v, --verbose         print full tracebacks of errors
+    -V, --version         show program's version number and exit
+    -E, --extensions      print supported file extensions (as JSON list) and
+                            exit
+    -i PATTERN, --ignore PATTERN
+                            paths/patterns to be ignored
 ```
 
 `character`, `split`, and `unified` modes output character-based, side-by-side, and unified (respectively) diffs between the inputted file and the correctly styled version. `score` outputs the raw percentage of correct (unchanged) lines, while `json` outputs a json object containing information pertinent to the CS50 IDE plugin (coming soon).
 
 ## Language Support
+
 `style50` currently supports the following languages:
 
 - C++
@@ -53,8 +58,8 @@ from style50 import StyleCheck, Style50
 
 
 class FooBar(StyleCheck):
-    
-    # REQUIRED: this property informs style50 what file extensions this 
+
+    # REQUIRED: this property informs style50 what file extensions this
     # check should be run on (in this case, all .fb and .foobar files)
     extensions = ["fb", "foobar"]
 
@@ -63,8 +68,8 @@ class FooBar(StyleCheck):
         # All FooBar code is perfectly styled
         return code
 
-    # OPTIONAL: should return the number of comments in `code`. 
-    # If this function is not defined, `style50` will not warn the student about 
+    # OPTIONAL: should return the number of comments in `code`.
+    # If this function is not defined, `style50` will not warn the student about
     # too few comments
     def count_comments(self, code):
         # A real-world, check would need to worry about not counting '#' in string-literals
@@ -74,7 +79,6 @@ class FooBar(StyleCheck):
 All classes which inherit from `StyleCheck` are automatically registered with `style50`'s `Style50` class, making style50 easily extensible. Adding the following to the above code creates a script which checks the code that `style50` already does as well as FooBar programs.
 
 ```python
-# Style check the current directory, printing a unified diff
-Style50("unified").run(["."])
-
+    # Style check the current directory, printing a unified diff
+    Style50("unified").run(["."])
 ```