Fix several typos

book/spelling_exceptions.txt

@@ -404,7 +404,6 @@ hscale
 hspace
 htb
 htp
-hydrations
 hyperref
 hypersetup
 ie
@@ -413,7 +412,6 @@ ifnextchar
 ifthenelse
 ifwidelayout
 includegraphics
-industrialisation
 injera
 isaccessible
 jalapeño
@@ -422,7 +420,6 @@ kao
 karl
 keepaspectratio
 kitchenaid
-labelled
 lacto
 le
 leavevmode
@@ -500,7 +497,6 @@ scandinavia
 scorings
 selectfont
 semibold
-sep
 setchapterimage
 setchapterpreamble
 setchapterstyle
@@ -557,7 +553,6 @@ vspace
 wahlfeld
 wait1
 wait2
-wetted
 xsep
 xshift
 yYkTrGHNW2w