Use parens, not WSA in tests, add docs linebreaks, factor calls into …

…a var.

crates/compiler/builtins/bitcode/src/str.zig

@@ -371,11 +371,12 @@ pub const RocStr = extern struct {
     }
 
     fn refcount(self: RocStr) usize {
-        if ((self.getCapacity() == 0 and !self.isSeamlessSlice()) or self.isSmallStr()) {
+        const is_seamless_slice = self.isSeamlessSlice();
+        if ((self.getCapacity() == 0 and !is_seamless_slice) or self.isSmallStr()) {
             return 1;
         }
 
-        const data_ptr = if (self.isSeamlessSlice())
+        const data_ptr = if (is_seamless_slice)
             self.getAllocationPtr()
         else
             self.bytes;

crates/compiler/builtins/roc/Str.roc

@@ -1094,17 +1094,28 @@ drop_suffix = |haystack, suffix|
     else
         haystack
 
-## Returns a version of the string with all [ASCII characters](https://en.wikipedia.org/wiki/ASCII) lowercased. Non-ASCII characters are left unmodified. For example:
+## Returns a version of the string with all [ASCII characters](https://en.wikipedia.org/wiki/ASCII) lowercased.
+## Non-ASCII characters are left unmodified. For example:
 ##
 ## ```roc
 ## expect "CAFÉ".with_ascii_lowercased() == "cafÉ"
 ## ```
 ##
-## This function is useful for things like [command-line options](https://en.wikipedia.org/wiki/Command-line_interface#Command-line_option) and [environment variables](https://en.wikipedia.org/wiki/Environment_variablewhere you ## know in advance that you're dealing with a hardcoded string containing only ASCII characters. It has better performance than lowercasing operations which take Unicode into account.
+## This function is useful for things like [command-line options](https://en.wikipedia.org/wiki/Command-line_interface#Command-line_option)
+## and [environment variables](https://en.wikipedia.org/wiki/Environment_variable)
+## know in advance that you're dealing with a hardcoded string containing only ASCII characters.
+## It has better performance than lowercasing operations which take Unicode into account.
 ##
-## That said, strings received from user input can always contain non-ASCII Unicode characters, and lowercasing [Unicode](https://unicode.org) works differently in different languages. For example, the string `"I"lowercases to `"i"## ` in English and to `"ı"` (a [dotless i](https://en.wikipedia.org/wiki/Dotless_I)) in Turkish. These rules can also change in each [Unicode release](https://www.unicode.org/releases/), so we have separate [`unicode` package]## (https://github.com/roc-lang/unicode) for Unicode capitalization that can be upgraded independently from the language's builtins.
+## That said, strings received from user input can always contain
+## non-ASCII Unicode characters, and lowercasing [Unicode](https://unicode.org) works
+## differently in different languages. For example, the string `"I"` lowercases to `"i"`
+## in English and to `"ı"` (a [dotless i](https://en.wikipedia.org/wiki/Dotless_I))
+## in Turkish. These rules can also change in each [Unicode release](https://www.unicode.org/releases/),
+## so we have separate [`unicode` package](https://github.com/roc-lang/unicode)
+## for Unicode capitalization that can be upgraded independently from the language's builtins.
 ##
-## To do a case-insensitive comparison of the ASCII characters in a string, use [`caseless_ascii_equals`](#caseless_ascii_equals).
+## To do a case-insensitive comparison of the ASCII characters in a string,
+## use [`caseless_ascii_equals`](#caseless_ascii_equals).
 with_ascii_lowercased : Str -> Str
 
 expect Str.with_ascii_lowercased("cOFFÉ") == "coffÉ"

crates/compiler/test_gen/src/gen_str.rs

@@ -2066,7 +2066,7 @@ fn str_drop_suffix() {
 fn with_ascii_lowercased() {
     assert_evals_to!(
         r#"
-        Str.with_ascii_lowercased "cOFFÉ"
+        Str.with_ascii_lowercased("cOFFÉ")
         "#,
         RocStr::from("coffÉ"),
         RocStr
@@ -2079,8 +2079,8 @@ fn with_ascii_lowercased_non_zero_refcount() {
     assert_evals_to!(
         r#"
         original = "cOFFÉ cOFFÉ cOFFÉ cOFFÉ cOFFÉ cOFFÉ cOFFÉ cOFFÉ cOFFÉ cOFFÉ cOFFÉ cOFFÉ"
-        res = Str.with_ascii_lowercased original
-        Str.drop_prefix res original
+        res = Str.with_ascii_lowercased(original)
+        Str.drop_prefix(res, original)
         "#,
         RocStr::from("coffÉ coffÉ coffÉ coffÉ coffÉ coffÉ coffÉ coffÉ coffÉ coffÉ coffÉ coffÉ"),
         RocStr