Remove space around `\zhdigits' in date (partially revert 6f80b5cc).

doc/readme/pkuthss.tex

@@ -60,7 +60,7 @@
 	cauthor = {盖茨波·钛·维克托},
 	eauthor = {Casper Ti.\ Vector},
 	studentid = {00910???},
-	date = {\zhdigits{2019} 年 \zhnumber{11} 月},
+	date = {\zhdigits{2019}年\zhnumber{11}月},
 	school = {化学与分子工程学院},
 	cmajor = {化学（？）}, emajor = {Chemistry ... ?},
 	direction = {据说 Casper 自己也不知道},

utils/bump

@@ -4,7 +4,7 @@
 # Public domain.
 
 NUMDATE = $(shell date '+%Y/%m/%d')
-CNDATE = $(shell date '+\\zhdigits{%Y} 年 \\zhnumber{%-m} 月')
+CNDATE = $(shell date '+\\zhdigits{%Y}年\\zhnumber{%-m}月')
 
 revbump:
 	sed -i '/\\Provides/,+1 s;\[[^ ]* [^ ]*;[$(NUMDATE) v$(VERSION);g' \