Wrong vcs revision in properties file after commiting by teamcity

I have pom:

            <plugin>
                <artifactId>maven-antrun-plugin</artifactId>
                <version>1.6</version>
                <executions>
                    <execution>
                        <id>copy-rpms</id>
                        <phase>package</phase>
                        <configuration>
                            <tasks>
                                <mkdir dir="${dstName}"/>
                                <copy todir="${dstName}"
                                      includeemptydirs="true">
                                    <fileset dir="target/rpm/iqbuzz-saas/RPMS/noarch"/>
                                </copy>
                                <propertyfile file="../server/src/main/resources/buildnumber.properties">
                                    <entry key="buildnumber" type="int" operation="=" value="${build.number}"/>
                                    <entry key="revision" type="int" operation="=" value="${build.vcs.number.INTERNAL}"/>
                                    <entry key="minor" type="int" operation="+" value="1" default="0"/>
                                </propertyfile>
                            </tasks>
                        </configuration>
                        <goals>
                            <goal>run</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>


And after teamcity commits buildnumber.properties file have next property:

revision=8\u00a0772
we use SVN. Why revision number is corrupted?