Rename table for clarity

Author: sfackler

src/lib.rs

@@ -130,7 +130,7 @@ pub fn nameprep<'a>(s: &'a str) -> Result<Cow<'a, str>, Error> {
         .filter(|&c| !tables::commonly_mapped_to_nothing(c))
         .collect::<String>();
 
-    let mapped = tables::case_fold(&mapped);
+    let mapped = tables::case_fold_for_nfkc(&mapped);
 
     // 4. Normalization
     let normalized = mapped.nfkc().collect::<String>();
@@ -176,7 +176,7 @@ pub fn nodeprep<'a>(s: &'a str) -> Result<Cow<'a, str>, Error> {
         .filter(|&c| !tables::commonly_mapped_to_nothing(c))
         .collect::<String>();
 
-    let mapped = tables::case_fold(&mapped);
+    let mapped = tables::case_fold_for_nfkc(&mapped);
 
     // A.4. Normalization
     let normalized = mapped.nfkc().collect::<String>();

src/tables.rs

@@ -25,7 +25,7 @@ pub fn commonly_mapped_to_nothing(c: char) -> bool {
 }
 
 /// B.2 Mapping for case-folding used with NFKC.
-pub fn case_fold(s: &str) -> String {
+pub fn case_fold_for_nfkc(s: &str) -> String {
     let mut result = String::new();
 
     // Each character either maps to a sequence of replacement characters,