build: fix trailing newline in version string

 build.zig          | 5 ++++-
 river/main.zig     | 2 +-
 riverctl/main.zig  | 2 +-
 rivertile/main.zig | 2 +-
 4 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/build.zig b/build.zig
index fedb940..b0c951b 100644
--- a/build.zig
+++ b/build.zig
@@ -61,7 +61,10 @@ pub fn build(b: *zbs.Builder) !void {
                 &ret,
                 .Inherit,
             ) catch break :blk version;
-            break :blk try std.fmt.allocPrintZ(b.allocator, "{s}-{s}", .{ version, git_commit_hash });
+            break :blk try std.fmt.allocPrintZ(b.allocator, "{s}-{s}", .{
+                version,
+                mem.trim(u8, git_commit_hash, &std.ascii.spaces),
+            });
         } else {
             break :blk version;
         }
diff --git a/river/main.zig b/river/main.zig
index 1caa613..e13315d 100644
--- a/river/main.zig
+++ b/river/main.zig
@@ -63,7 +63,7 @@ pub fn main() anyerror!void {
     }
 
     if (result.boolFlag("-version")) {
-        try io.getStdOut().writeAll(build_options.version);
+        try io.getStdOut().writeAll(build_options.version ++ "\n");
         os.exit(0);
     }
     if (result.argFlag("-log-level")) |level_str| {
diff --git a/riverctl/main.zig b/riverctl/main.zig
index 624f076..63ec331 100644
--- a/riverctl/main.zig
+++ b/riverctl/main.zig
@@ -78,7 +78,7 @@ fn _main() !void {
         os.exit(0);
     }
     if (result.boolFlag("-version")) {
-        try io.getStdOut().writeAll(@import("build_options").version);
+        try io.getStdOut().writeAll(@import("build_options").version ++ "\n");
         os.exit(0);
     }
 
diff --git a/rivertile/main.zig b/rivertile/main.zig
index 19857c3..9a8b2f0 100644
--- a/rivertile/main.zig
+++ b/rivertile/main.zig
@@ -332,7 +332,7 @@ pub fn main() !void {
     if (result.args.len != 0) fatalPrintUsage("unknown option '{s}'", .{result.args[0]});
 
     if (result.boolFlag("-version")) {
-        try std.io.getStdOut().writeAll(@import("build_options").version);
+        try std.io.getStdOut().writeAll(@import("build_options").version ++ "\n");
         os.exit(0);
     }
     if (result.argFlag("-view-padding")) |raw| {