Update libpq test expected output

Commit 2b443063 changed wording for some of the error messages, but
neglected updating the regress output to match.

src/interfaces/libpq/test/expected.out

@@ -59,7 +59,7 @@ trying postgresql://host/db?u%73er=someotheruser&port=12345
 user='someotheruser' dbname='db' host='host' port='12345' (inet)
 
 trying postgresql://host/db?u%7aer=someotheruser&port=12345
-uri-regress: invalid URI query parameter "uzer"
+uri-regress: invalid URI query parameter: "uzer"
 
 
 trying postgresql://host:12345?user=uri-user
@@ -102,7 +102,7 @@ trying postgres://?host=/path/to/socket/dir
 host='/path/to/socket/dir' (local)
 
 trying postgresql://host?uzer=
-uri-regress: invalid URI query parameter "uzer"
+uri-regress: invalid URI query parameter: "uzer"
 
 
 trying postgre://
@@ -110,47 +110,47 @@ uri-regress: missing "=" after "postgre://" in connection info string
 
 
 trying postgres://[::1
-uri-regress: end of string reached when looking for matching ']' in IPv6 host address in URI: postgres://[::1
+uri-regress: end of string reached when looking for matching "]" in IPv6 host address in URI: "postgres://[::1"
 
 
 trying postgres://[]
-uri-regress: IPv6 host address may not be empty in URI: postgres://[]
+uri-regress: IPv6 host address may not be empty in URI: "postgres://[]"
 
 
 trying postgres://[::1]z
-uri-regress: unexpected 'z' at position 17 in URI (expecting ':' or '/'): postgres://[::1]z
+uri-regress: unexpected character "z" at position 17 in URI (expected ":" or "/"): "postgres://[::1]z"
 
 
 trying postgresql://host?zzz
-uri-regress: missing key/value separator '=' in URI query parameter: zzz
+uri-regress: missing key/value separator "=" in URI query parameter: "zzz"
 
 
 trying postgresql://host?value1&value2
-uri-regress: missing key/value separator '=' in URI query parameter: value1
+uri-regress: missing key/value separator "=" in URI query parameter: "value1"
 
 
 trying postgresql://host?key=key=value
-uri-regress: extra key/value separator '=' in URI query parameter: key
+uri-regress: extra key/value separator "=" in URI query parameter: "key"
 
 
 trying postgres://host?dbname=%XXfoo
-uri-regress: invalid percent-encoded token: %XXfoo
+uri-regress: invalid percent-encoded token: "%XXfoo"
 
 
 trying postgresql://a%00b
-uri-regress: forbidden value %00 in percent-encoded value: a%00b
+uri-regress: forbidden value %00 in percent-encoded value: "a%00b"
 
 
 trying postgresql://%zz
-uri-regress: invalid percent-encoded token: %zz
+uri-regress: invalid percent-encoded token: "%zz"
 
 
 trying postgresql://%1
-uri-regress: invalid percent-encoded token: %1
+uri-regress: invalid percent-encoded token: "%1"
 
 
 trying postgresql://%
-uri-regress: invalid percent-encoded token: %
+uri-regress: invalid percent-encoded token: "%"
 
 
 trying postgres://@host