[format] Fix presentation of whitespace; use \caret

Author: tkoeppe

source/utilities.tex

@@ -14907,7 +14907,7 @@
 string s1 = format("{:6}", 'x');            // value of \tcode{s1} is \tcode{"x\ \ \ \ \ "}
 string s2 = format("{:*<6}", 'x');          // value of \tcode{s2} is \tcode{"x*****"}
 string s3 = format("{:*>6}", 'x');          // value of \tcode{s3} is \tcode{"*****x"}
-string s4 = format("{:*^6}", 'x');          // value of \tcode{s4} is \tcode{"**x***"}
+string s4 = format("{:*@\caret{}@6}", 'x');          // value of \tcode{s4} is \tcode{"**x***"}
 string s5 = format("{:6d}", c);             // value of \tcode{s5} is \tcode{"\ \ \ 120"}
 string s6 = format("{:6}", true);           // value of \tcode{s6} is \tcode{"true\ \ "}
 string s7 = format("{:*<6.3}", "123456");   // value of \tcode{s7} is \tcode{"123***"}
@@ -15052,7 +15052,7 @@
 string s1 = format("{:+06d}", c);       // value of \tcode{s1} is \tcode{"+00120"}
 string s2 = format("{:#06x}", 0xa);     // value of \tcode{s2} is \tcode{"0x000a"}
 string s3 = format("{:<06}", -42);      // value of \tcode{s3} is \tcode{"-42\ \ \ "} (\tcode{0} has no effect)
-string s4 = format("{:06}", inf);       // value of \tcode{s4} is \tcode{"   inf"} (\tcode{0} has no effect)
+string s4 = format("{:06}", inf);       // value of \tcode{s4} is \tcode{"\ \ \ inf"} (\tcode{0} has no effect)
 \end{codeblock}
 \end{example}
 
@@ -16136,7 +16136,7 @@
 %% FIXME: their Unicode characters are not available in our font (Latin Modern).
 \begin{example}
 \begin{codeblock}
-string s0 = format("[{}]", "h\tllo");               // \tcode{s0} has value: \tcode{[h    llo]}
+string s0 = format("[{}]", "h\tllo");               // \tcode{s0} has value: \tcode{[h\ \ \ \ llo]}
 string s1 = format("[{:?}]", "h\tllo");             // \tcode{s1} has value: \tcode{["h\textbackslash tllo"]}
 string s3 = format("[{:?}, {:?}]", '\'', '"');      // \tcode{s3} has value: \tcode{['\textbackslash '', '"']}