spelling: Add several corrections

data/spelling/corrections

@@ -317,6 +317,12 @@ anwsered||answered
 anwsering||answering
 anwsers||answers
 anyting||anything
+apendage||appendage
+apend||append
+apended||appended
+apender||appender
+apendices||appendices
+apending||appending
 apendix||appendix
 aplication||application
 apllied||applied
@@ -2479,6 +2485,7 @@ isnt||isn't
 isssue||issue
 isssues||issues
 issueing||issuing
+istalling||installing
 istead||instead
 iterface||interface
 iterfaces||interfaces
@@ -2529,6 +2536,7 @@ laucher||launcher
 lauches||launches
 lauching||launching
 lauch||launch
+launck||launch
 lazyness||laziness
 leat||least
 leats||least
@@ -3300,6 +3308,8 @@ quitt||quit
 reachs||reaches
 readabilty||readability
 readapted||re-adapted
+realtion||relation
+realtions||relations
 reamde||README
 reappered||reappeared
 reappering||reappearing
@@ -3913,6 +3923,8 @@ suble||subtle
 subsecrion||subsection
 subseqent||subsequent
 subsequest||subsequent
+substituations||substitutions
+substituation||substitution
 substituded||substituted
 substitudes||substitutes
 substitude||substitute