Add option to show pull requests again

This change adds a long-form flag `--show-pulls` to `hub issue` that
directs hub to include pull requests in the issue listing.  The
default value is false; the default behavior does not change.

Temporary fix until a better abstraction for pull requests can be
designed.

Related: #1303
Related: vermiculus/magithub#44

commands/issue.go

@@ -130,6 +130,9 @@ With no arguments, show a list of open issues.
 
 	-^ --sort-ascending
 		Sort by ascending dates instead of descending.
+
+	--show-pulls
+		Show pull requests as well.
 `,
 	}
 
@@ -156,6 +159,7 @@ With no arguments, show a list of open issues.
 	flagIssueCopy,
 	flagIssueBrowse,
 	flagIssueSortAscending bool
+	flagIssueShowPulls bool
 
 	flagIssueMilestone uint64
 
@@ -183,6 +187,7 @@ func init() {
 	cmdIssue.Flag.StringVarP(&flagIssueSince, "since", "d", "", "DATE")
 	cmdIssue.Flag.StringVarP(&flagIssueSort, "sort", "o", "created", "SORT_KEY")
 	cmdIssue.Flag.BoolVarP(&flagIssueSortAscending, "sort-ascending", "^", false, "SORT_KEY")
+	cmdIssue.Flag.BoolVarP(&flagIssueShowPulls, "show-pulls", "", false, "SHOW_PULLS")
 
 	cmdIssue.Use(cmdCreateIssue)
 	CmdRunner.Use(cmdIssue)
@@ -240,7 +245,7 @@ func listIssues(cmd *Command, args *Args) {
 
 		colorize := ui.IsTerminal(os.Stdout)
 		for _, issue := range issues {
-			if issue.PullRequest != nil {
+			if !flagIssueShowPulls && issue.PullRequest != nil {
 				continue
 			}