A few documentation language and minor correctness fixes

[stepnem]

No description provided.

[codecov-commenter]

Codecov Report

Merging #1197 (e9580dc) into master (a8b2650) will decrease coverage by 0.03%.
The diff coverage is 66.66%.

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@@            Coverage Diff             @@
##           master    #1197      +/-   ##
==========================================
- Coverage   66.05%   66.03%   -0.03%     
==========================================
  Files          46       46              
  Lines        7595     7595              
==========================================
- Hits         5017     5015       -2     
- Misses       2578     2580       +2     

Flag	Coverage Δ
unittests	66.03% <66.66%> (-0.03%)	⬇️

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Files Changed	Coverage Δ
src/draw.c	51.35% <0.00%> (ø)
src/dbus.c	56.65% <100.00%> (ø)
test/draw.c	98.85% <100.00%> (ø)

... and 1 file with indirect coverage changes

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[fwsmit]

Hey, thanks for the improvements! I'll merge it