Update scalafmt-core to 3.7.15

.git-blame-ignore-revs

@@ -0,0 +1,2 @@
+# Scala Steward: Reformat with scalafmt 3.7.15
+2fd0bf62fcd7a71afe5aa2459cab002d719ffb5f

.scalafmt.conf

@@ -1,4 +1,4 @@
-version = 3.7.14
+version = 3.7.15
 
 runner.dialect = scala213source3
 maxColumn = 120

build.sbt

@@ -1,10 +1,9 @@
 // SPDX-License-Identifier: Apache-2.0
 
-
 lazy val commonSettings = Seq(
   organization := "edu.berkeley.cs",
   scalaVersion := "2.13.10",
-  crossScalaVersions := Seq("2.13.10"),
+  crossScalaVersions := Seq("2.13.10")
 )
 
 val chiselVersion = "6.0.0-M3"
@@ -33,7 +32,7 @@ lazy val chiseltestSettings = Seq(
     compilerPlugin(("org.chipsalliance" % "chisel-plugin" % chiselVersion).cross(CrossVersion.full))
   ),
   resolvers ++= Resolver.sonatypeOssRepos("snapshots"),
-  resolvers ++= Resolver.sonatypeOssRepos("releases"),
+  resolvers ++= Resolver.sonatypeOssRepos("releases")
 )
 
 lazy val publishSettings = Seq(
@@ -74,10 +73,10 @@ lazy val publishSettings = Seq(
     } else {
       Some("releases".at(nexus + "service/local/staging/deploy/maven2"))
     }
-  },
+  }
 )
 
 lazy val chiseltest = (project in file("."))
   .settings(commonSettings)
   .settings(chiseltestSettings)
-  .settings(publishSettings)
+  .settings(publishSettings)