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Fix a small typo in tutor document (#5449)
0c51201liuxueyang
runtime/tutor+1−1
@@ -1087,7 +1087,7 @@ letters! that is not good grammar. you can fix this.
1087
1087
1088 * Type ~ to alternate case of selected letters.
1088 * Type ~ to alternate case of selected letters.
1089 * Use ` and Alt-` to set the case of selected letters to
1089 * Use ` and Alt-` to set the case of selected letters to
1090− upper and lower respectively.
1090+ lower and upper respectively.
1091
1091
1092 * Type S to split selections on regex.
1092 * Type S to split selections on regex.
1093
1093