clean up .gitignore file

.gitignore

@@ -1,4 +1,4 @@
-## Core latex/pdflatex auxiliary files:
+## Core latex/pdflatex auxiliary files
 *.aux
 *.lof
 *.log
@@ -12,7 +12,7 @@
 *.cb2
 .*.lb
 
-## Intermediate documents:
+## Intermediate documents
 *.dvi
 *.xdv
 *-converted-to.*
@@ -24,7 +24,7 @@
 ## Generated if empty string is given at "Please type another file name for output:"
 .pdf
 
-## Bibliography auxiliary files (bibtex/biblatex/biber):
+## Bibliography auxiliary files (bibtex/biblatex/biber)
 *.bbl
 *.bcf
 *.blg
@@ -32,7 +32,7 @@
 *-blx.bib
 *.run.xml
 
-## Build tool auxiliary files:
+## Build tool auxiliary files
 *.fdb_latexmk
 *.synctex
 *.synctex(busy)
@@ -44,7 +44,7 @@
 # latexrun
 latex.out/
 
-## Auxiliary and intermediate files from other packages:
+## Auxiliary and intermediate files from other packages
 # algorithms
 *.alg
 *.loa