shift now accept type="shift" for more intuitive give.names=T output,…

[jangorecki]

… closes #3223

[codecov]

Codecov Report

Merging #3226 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #3226      +/-   ##
==========================================
- Coverage   94.65%   94.64%   -0.01%     
==========================================
  Files          65       65              
  Lines       12076    12077       +1     
==========================================
  Hits        11430    11430              
- Misses        646      647       +1

Impacted Files	Coverage Δ
src/shift.c	99.15% <100%> (ø)	⬆️
R/shift.R	88.88% <100%> (-11.12%)	⬇️

---

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[codecov]

Codecov Report

Merging #3226 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #3226      +/-   ##
==========================================
+ Coverage   94.65%   94.65%   +<.01%     
==========================================
  Files          65       65              
  Lines       12076    12098      +22     
==========================================
+ Hits        11430    11451      +21     
- Misses        646      647       +1

Impacted Files	Coverage Δ
src/shift.c	99.15% <100%> (ø)	⬆️
R/shift.R	93.75% <100%> (-6.25%)	⬇️
R/foverlaps.R	100% <0%> (ø)	⬆️
src/subset.c	100% <0%> (ø)	⬆️
src/assign.c	94.66% <0%> (+0.09%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 87e48f0...32eee2b. Read the comment docs.