Quote wa command generated in visual mode (#11138)

[cryslith]

Fixes #11138 (a command in visual mode).

[codecov-io]

Codecov Report

Merging #14459 into master will decrease coverage by <.01%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master   #14459      +/-   ##
==========================================
- Coverage   37.71%   37.71%   -0.01%     
==========================================
  Files         949      949              
  Lines      306508   306509       +1     
==========================================
  Hits       115586   115586              
- Misses     190922   190923       +1

Impacted Files	Coverage Δ
libr/core/visual.c	12.77% <0%> (-0.01%)	⬇️

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[radare]

Thanks!!