Write '0' should be honored in db options.
wrap debug log in a call to format
doc: close event is always emitted
Added test for updates with w=0 in Connection String Options
Fixed parsing of write concern option in URL

The issue was introduced in 927692e and a test added in #1191.
Update NodeKOArticle1.md

I found some erroneous "it's" that should be "its".
Update NodeKOArticle1.md

Found some spelling errors and extra apostrophes.
fix aggregatestream.close()
Merge pull request #1192 from tochiai/patch-1

Update NodeKOArticle1.md - Grammar
Merge pull request #1193 from tochiai/patch-2

Update NodeKOArticle1.md
Merge pull request #1190 from LinusU/patch-1

doc: close event is always emitted
Merge pull request #1187 from andyroyle/fix-ping-logging-message

wrap debug log in a call to format
Merge pull request #1191 from gabmontes/test-update-write-concern

Added test for updates with w=0 in Connection String Options
Fixed w being string
Merge pull request #1186 from jsdevel/false-options-should-not-trigger-write-concern

False option values should not trigger w:1.
Merge pull request #1194 from jonathanong/patch-1

fix aggregatestream.close()
Fixed failing text index tests for 2.4.9