Update dev docs

Author: shyuep

docs/monty.functools.md

@@ -73,10 +73,13 @@ becomes
 The decorated main accepts two new arguments:
 
 > prof_file: Name of the output file with profiling data
+
 > ```none
 > If not given, a temporary file is created.
 > ```
+
 > sortby: Profiling data are sorted according to this value.
+
 > ```none
 > default is “time”. See sort_stats.
 > ```

docs/monty.os.md

@@ -15,6 +15,7 @@ performing some tasks, and returns to the original working directory
 afterwards. E.g.,
 
 > with cd(“/my/path/”):
+
 > ```none
 > do_something()
 > ```

docs/monty.re.md

@@ -25,9 +25,11 @@ A powerful regular expression version of grep.
 * **Returns**
 
 > {key1: [[[matches…], lineno], [[matches…], lineno],
+
 > ```none
 > [[matches…], lineno], …],
 > ```
+
 > key2: …}
 
 For reverse reads, the lineno is given as a -ve number. Please note