Fix spelling for words used once, beginning with 'e' -> 'i', inclusive

Problem/Motivation

Limit this to one line easy fixes, avoid any possible controversy, or any change that would better fit with other words, such as doing chien and chiens in the same patch.

The list of words beginning with e -> i, inclusive, that are used once in one file → .

Proposed resolution

Remove the following from dictionary.txt
19 words
-derp
-egroe
-fetchmode
-fffffg
-filterprovider
-firstcolumn
-formatless
-fourthcolumn
-getcode
-getfile
-getmachine
-gonner
-herpderp
-hreflangs
-htmlto
-inator
-inspectable
-secondcolumn
-thirdcolumn

Remaining tasks

Review
Commit

User interface changes

API changes

Data model changes

Release notes snippet