Clean up tests for fold-handling

Give the do-blocks a better description and remove unnecessary option
settings in the execute-blocks. See justinmk#152.

tests/test.vader

@@ -1110,17 +1110,13 @@ Execute (cleanup):
 ###########################################################
 # Fold Handling
 
-Execute (set foldmethod=manual):
-  set foldmethod=manual
-  set foldopen+=search
-
 Given:
   aaaaaaaaaa
   aaaaabaaba
   ababaaaaaa
   aaaaaabaaa
 
-Do (using s and ;):
+Do (s and ; in folds):
   jzfjggsba;x
 
 Expect:
@@ -1129,7 +1125,7 @@ Expect:
   ababaaaaaa
   aaaaaabaaa
 
-Do (using s and \):
+Do (s and \ in folds):
   jzfjGsba\\x
 
 Expect:
@@ -1138,7 +1134,7 @@ Expect:
   aabaaaaaa
   aaaaaabaaa
 
-Do (using S and ;):
+Do (S and ; in folds):
   jzfjG$Sba;x
 
 Expect:
@@ -1147,7 +1143,7 @@ Expect:
   abaaaaaaa
   aaaaaabaaa
 
-Do (using S and \):
+Do (S and \ in folds):
   jzfjggSba\\x
 
 Expect:
@@ -1159,7 +1155,7 @@ Expect:
 Execute (set foldopen-=search):
   set foldopen-=search
 
-Do (using s and ;):
+Do (s and ; in folds):
   jzfjggsba;x
 
 Expect:
@@ -1168,14 +1164,14 @@ Expect:
   ababaaaaaa
   aaaaaaaaa
 
-Do (using s and \):
+Do (s and \ in folds):
   jzfjGsba\\x
 
 Expect:
   aaaaaaaaaa
   aaaaaabaaa
 
-Do (using S and ;):
+Do (S and ; in folds):
   jzfjG$Sba;zvx
 
 Expect:
@@ -1184,7 +1180,7 @@ Expect:
   abaaaaaaa
   aaaaaabaaa
 
-Do (using S and \):
+Do (S and \ in folds):
   jzfjggSba\\x
 
 Expect:
@@ -1194,5 +1190,4 @@ Expect:
   aaaaaaaaa
 
 Execute (cleanup):
-  set foldmethod=indent
   set foldopen+=search