Documentation tweaks

[krlmlr]

Originally in #49.

[brodieG]

I'm going to close this issue because the section of the docs that you are tweaking will need to be immediately changed to reflect the issues with R-3.2.0-3.2.1, so it doesn't really make sense to merge this now.

Thank you for proposing the edits.

[brodieG]

Actually, re-opening for now until I actually make the doc changes.

[codecov-io]

Codecov Report

Merging #51 into development will decrease coverage by 6.63%.
The diff coverage is n/a.

@@               Coverage Diff               @@
##           development      #51      +/-   ##
===============================================
- Coverage          100%   93.36%   -6.64%     
===============================================
  Files               24       24              
  Lines             2044     2034      -10     
===============================================
- Hits              2044     1899     -145     
- Misses               0      135     +135

Impacted Files	Coverage Δ
R/tohtml.R	33.33% <0%> (-66.67%)	⬇️
R/strip.R	38.46% <0%> (-61.54%)	⬇️
R/has.R	42.85% <0%> (-57.15%)	⬇️
R/nchar.R	45.71% <0%> (-54.29%)	⬇️
R/strwrap.R	56.98% <0%> (-43.02%)	⬇️
R/strtrim.R	76.08% <0%> (-23.92%)	⬇️
R/strsplit.R	79.71% <0%> (-20.29%)	⬇️
R/misc.R	82.85% <0%> (-17.15%)	⬇️
R/substr2.R	87.62% <0%> (-12.38%)	⬇️
R/internal.R	90% <0%> (-10%)	⬇️

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