Some minor fixes

Author: danimtb

reference/tools.rst

@@ -862,14 +862,13 @@ Parameters:
     - **filename** (Required): Name of the executable file. It doesn't require the extension of the executable.
 
 tools.unix2dos()
--------------
+----------------
 
 .. code-block:: python
 
     def unix2dos(filepath)
 
 Converts line breaks in a text file from Unix format (LF) to DOS format (CRLF).
-Returns True for success, False otherwise.
 
 .. code-block:: python
 
@@ -881,20 +880,19 @@ Parameters:
     - **filepath** (Required): The file to convert.
 
 tools.dos2unix()
--------------
+----------------
 
 .. code-block:: python
 
     def dos2unix(filepath)
 
 Converts line breaks in a text file from DOS format (CRLF) to Unix format (LF).
-Returns True for success, False otherwise.
 
 .. code-block:: python
 
     from conans import tools
 
-    tools.dos2unix("dosfile")
+    tools.dos2unix("dosfile.txt")
 
 Parameters:
     - **filepath** (Required): The file to convert.