Allow for space delimiters (#80)

envconfig.go

@@ -76,6 +76,7 @@ import (
 	"strconv"
 	"strings"
 	"time"
+	"unicode"
 )
 
 const (
@@ -452,7 +453,7 @@ func keyAndOpts(tag string) (string, *options, error) {
 
 LOOP:
 	for i, o := range tagOpts {
-		o = strings.TrimSpace(o)
+		o = strings.TrimLeftFunc(o, unicode.IsSpace)
 		switch {
 		case o == optOverwrite:
 			opts.Overwrite = true

envconfig_test.go

@@ -2391,6 +2391,36 @@ func TestProcessWith(t *testing.T) {
 				"URL": "https://foo.bar",
 			}),
 		},
+		{
+			// https://github.com/sethvargo/go-envconfig/issues/79
+			name: "space_delimiter",
+			input: &struct {
+				Field map[string]string `env:"FIELD,delimiter= "`
+			}{},
+			exp: &struct {
+				Field map[string]string `env:"FIELD,delimiter= "`
+			}{
+				Field: map[string]string{"foo": "1,2", "bar": "3,4", "zip": "zap:zoo,3"},
+			},
+			lookuper: MapLookuper(map[string]string{
+				"FIELD": "foo:1,2 bar:3,4 zip:zap:zoo,3",
+			}),
+		},
+		{
+			// https://github.com/sethvargo/go-envconfig/issues/79
+			name: "space_separator",
+			input: &struct {
+				Field map[string]string `env:"FIELD,separator= "`
+			}{},
+			exp: &struct {
+				Field map[string]string `env:"FIELD,separator= "`
+			}{
+				Field: map[string]string{"foo": "bar", "zip:zap": "zoo:zil"},
+			},
+			lookuper: MapLookuper(map[string]string{
+				"FIELD": "foo bar,zip:zap zoo:zil",
+			}),
+		},
 	}
 
 	for _, tc := range cases {