manpage: minor fix

Also fix some other type in interface-changes.rst.

DOCS/interface-changes.rst

@@ -23,7 +23,7 @@ Interface changes
     - deprecate --heartbeat-cmd
     - remove --softvol=no capability:
         - deprecate --softvol, it now does nothing
-        - --volume, --mute, and the corrsponding properties now always control
+        - --volume, --mute, and the corresponding properties now always control
           softvol, and behave as expected without surprises (e.g. you can set
           them normally while no audio is initialized)
         - rename --softvol-max to --volume-max (deprecated alias is added)

DOCS/man/lua.rst

@@ -541,8 +541,8 @@ Example command-line::
      --script-opts=myscript-optionA=TEST,myscript-optionB=0,myscript-optionC=yes
 
 
-mp.utils options
-----------------
+mp.utils functions
+------------------
 
 This built-in module provides generic helper functions for Lua, and have
 strictly speaking nothing to do with mpv or video/audio playback. They are