doc: add few verbs and punctuation

[olksdr]

Adding few verbs and punctuations makes the reading the description a bit clearer.

[codecov-commenter]

Codecov Report

Merging #496 (8571260) into master (94c7bb5) will increase coverage by 0.03%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #496      +/-   ##
==========================================
+ Coverage   79.40%   79.43%   +0.03%     
==========================================
  Files          76       76              
  Lines        9064     9064              
==========================================
+ Hits         7197     7200       +3     
+ Misses       1867     1864       -3     

[olksdr]

Looks like some dependencies issues:

error: package `time v0.3.14` cannot be built because it requires rustc 1.59.0 or newer, while the currently active rustc version is 1.57.0
make: *** [check-no-default-features] Error 101
Error: Process completed with exit code 2.

but I do not see where this version is coming from. Locally Cargo.lock contains only following:

 "time 0.2.27",
 "time 0.3.13",

@Swatinem is there anything I can do here to help it to compile? 😄

[Swatinem]

We have to bump the MSRV: #498