doc updates

internal/pkg/cli/option_parse.go

@@ -171,6 +171,14 @@ Notes about all other separators:
 	}
 	fmt.Println()
 
+	fmt.Println("  - Similarly, you can use the following for `--ifs-regex` and `--ips-regex`:")
+	fmt.Println()
+	aliases = lib.GetArrayKeysSorted(SEPARATOR_REGEX_NAMES_TO_VALUES)
+	for _, alias := range aliases {
+		fmt.Printf("          %-10s = \"%s\"\n", alias, SEPARATOR_REGEX_NAMES_TO_VALUES[alias])
+	}
+	fmt.Println()
+
 	fmt.Println("* Default separators by format:")
 	fmt.Println()
 
@@ -205,6 +213,16 @@ func ListSeparatorAliasesForOnlineHelp() {
 	}
 }
 
+func ListSeparatorRegexAliasesForOnlineHelp() {
+	// Go doesn't preserve insertion order in its arrays so here we are inlining a sort.
+	aliases := lib.GetArrayKeysSorted(SEPARATOR_REGEX_NAMES_TO_VALUES)
+	for _, alias := range aliases {
+		// Really absurd level of indent needed to get fixed-with font in mkdocs here,
+		// I don't know why. Usually it only takes 4, not 10.
+		fmt.Printf("%-10s = \"%s\"\n", alias, SEPARATOR_REGEX_NAMES_TO_VALUES[alias])
+	}
+}
+
 func init() { SeparatorFlagSection.Sort() }
 
 var SeparatorFlagSection = FlagSection{

internal/pkg/cli/option_types.go

@@ -36,14 +36,14 @@ type TGeneratorOptions struct {
 }
 
 type TReaderOptions struct {
-	InputFileFormat     string
-	IFS                 string
-	IPS                 string
-	IRS                 string
-	AllowRepeatIFS      bool
-	IFSRegex            *regexp.Regexp
-	IPSRegex            *regexp.Regexp
-	DedupeFieldNames    bool
+	InputFileFormat  string
+	IFS              string
+	IPS              string
+	IRS              string
+	AllowRepeatIFS   bool
+	IFSRegex         *regexp.Regexp
+	IPSRegex         *regexp.Regexp
+	DedupeFieldNames bool
 
 	// If unspecified on the command line, these take input-format-dependent
 	// defaults.  E.g. default FS is comma for DKVP but space for NIDX;